JT SPROCKETS JTA853.50BLK : JT SPROCKETS Aluminium Ultra-Light Self-Cleaning Rear Sprocket 853 - 520 €32.70
D.I.D 48011110 : DID/PBR Chain Kit 520ERT3 14/48 Super-Reinforced - Ultra-Light Rear Sprocket €102.52
AFAM 48011415 : AFAM Chain Kit 520XRR3 13/48 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €162.62
D.I.D 485561 : DID/REN Chain Kit 520VX3 14/50 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €149.93
D.I.D 3035791 : DID/PBR Chain Kit 525ZVM-X2 17/44 Super-Reinforced - Ultra-Light Rear Sprocket €219.50
D.I.D 3036001 : DID/PBR Chain Kit 525ZVM-X2 15/41 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €287.56